Finding the Fourth Proportional to 72,166, 99,592.56 and 39,900.03

Step by Step Solution

1. Step 1: Write the proportion equation
   72,166 : 99,592.56 = 39,900.03 : x
2. Step 2: Convert to fraction form
   72,166/99,592.56 = 39,900.03/x
3. Step 3: Cross multiply
   72,166x = 99,592.56 × 39,900.03
4. Step 4: Simplify right side
   72,166x = 3,973,745,434.31
5. Step 5: Solve for x
   x = 3,973,745,434.31/72,166
6. Step 6: Final answer
   x = 55,063.96